Who Owns WTM?
White Mountains Insurance Group, Ltd. — Institutional Ownership & 13F Holdings
$2265.58
-1.98 (-0.09%)
Market Cap
$5.6B
Shares Outstanding
2,476,670
Institutional Holders
315
Total Inst. Value
$3.8B
% of Float Held
102.1%
QoQ Holder Change
+91
Institutional data as of Q1 2025
New Positions
50
Closed Positions
27
Increased
97
Decreased
102
Institutional Ownership Trend
Top 10 Institutional Holders(Q1 2025)
| # | Fund | Value | Shares |
|---|---|---|---|
| 1 | VANGUARD GROUP INC | $481.7M | 250,116 |
| 2 | MORGAN STANLEY | $328.6M | 170,631 |
| 3 | DIMENSIONAL FUND ADVISORS LP | $301.6M | 156,617 |
| 4 | BlackRock, Inc. | $224.9M | 116,799 |
| 5 | FULLER & THALER ASSET MANAGEMENT, INC. | $212.0M | 110,092 |
| 6 | River Road Asset Management, LLC | $211.2M | 109,665 |
| 7 | FIDUCIARY MANAGEMENT INC /WI/ | $138.3M | 71,795 |
| 8 | LONDON CO OF VIRGINIA | $133.2M | 69,158 |
| 9 | T. Rowe Price Investment Management, Inc. | $120.3M | 62,466 |
| 10 | Neuberger Berman Group LLC | $109.5M | 56,864 |
Biggest Buyers & Sellers This Quarter
Top Buyers
| Fund | Shares Added | Value |
|---|---|---|
| FIDUCIARY MANAGEMENT INC /WI/ | +23K | $138.3M |
| T. Rowe Price Investment Management, Inc. | +5K | $120.3M |
| Neuberger Berman Group LLC | +11K | $109.5M |
| STATE STREET CORP | +59 | $105.8M |
| REINHART PARTNERS, LLC. | +4K | $81.8M |
Top Sellers
| Fund | Shares Removed | Value |
|---|---|---|
| WELLINGTON MANAGEMENT GROUP LLP | -24K | $49.0M |
| MORGAN STANLEY | -7K | $328.6M |
| FULLER & THALER ASSET MANAGEMENT, INC. | -4K | $212.0M |
| River Road Asset Management, LLC | -3K | $211.2M |
| THOMPSON SIEGEL & WALMSLEY LLC | -2K | $16.0M |
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Frequently Asked Questions
How many institutional investors hold WTM?
As of Q1 2025, 315 institutional investors report holding WTM (White Mountains Insurance Group, Ltd.) in their 13F filings.
What percentage of White Mountains Insurance Group, Ltd. is owned by institutions?
Institutional investors hold approximately 102.1% of White Mountains Insurance Group, Ltd.'s float as reported in SEC 13F filings.
Which hedge fund owns the most WTM?
The largest institutional holder of WTM is VANGUARD GROUP INC with $481.7M in shares.
Are institutions buying or selling WTM?
This quarter, 50 institutions opened new positions in WTM and 27 closed their positions.
What is 13F institutional ownership?
SEC Form 13F is a quarterly report filed by institutional investment managers with over $100M in qualifying assets. It discloses their US equity holdings, providing transparency into what the largest investors are buying and selling.
How often is institutional ownership data updated?
13F filings are due 45 days after each calendar quarter end (May 15, Aug 14, Nov 14, Feb 14). Data is updated on HedgeTrace as new filings are processed.